Locomotive ash-pit.



0. SPAETH.

LOCOMOTIVE ASH PIT.

APPLICATION FILED APR. 28, 1909.

Patented Feb. 15, 1910.

1mm for 0X50 8pm? 8% OTTO SPAETH, OF CHICAGO, ILLINOIS.

LOCOMOTIVE ASH-PIT.

Specification of Letters Patent.

Application filed April 28, 1909.

Patented Feb. 15, 1910.

Serial No. 492.759.

To all whom it may concern:

Be it known that I, O'r'ro Sran'rn, a citizen of the United States,residing at Chicago, county of Cook, and State of .illinois, haveinvented certain new and useful lmrovements in Locomotive Ash-Pits, ofwhich the following is a specification.

My invention relates to im in'ovements in means for inducing an airdraft through locomotive ash pits, whereby forward move ment of thelocomotive induces said draft.

The object of my invention is to provide improved means for thispurpose, whereby the maximum amount of draft is obtained with the leastexpenditure of power, and my invention consists in the combination andarrangement of the parts hereinafter described and claimed.

In the drawings Figure l, is a section througlii a fire box and ash pitequipped with my invention, and Fig. 2, a bottom plan view of the firebox and ash pit.

Referring to the drawings. 1 indicates the ash pit, 2 the grate, 3 the[ire box, the

engine cab and 5 the boiler. These parts a re all old and well known.and may be of any of the usual or desired constructions. At the rear,ash pit l, is provided with a curved draft tube (3 connnunicating withthe rear of the ash pit and terminating with a forwardly projectingmouth 7, located under the rear of the ash pit and being lla ring inform. At either side the ash pit provided with diverging and forwardlyprojecting draft tubes 8, communicating with the ash pit at about itsmiddle. By this construction it will be seen that as the locomotivemoves forwardly, as indicated by the arrow in Fig. 1, air will be forcedinto tubes 6 and 8, passing thence into the ash pit v1, and up throughgrate 2, into the fire box 3, whence it passes out through the smokestack in the usual manner.

Owing to the fact that the mouth of tube 6 is below its discharge intothe ash pit, the heatin the ash pit, which naturally tends to make theair rise, will. assist the pressure induced by the forward movement ofthe locomotive to cause the air to pass upwardly through the grate. Thetubes 8 being horizontal, the heat will not tend to resist the entry ofair. The draft entering the ash pit through the tube (3 is met by thedraft entering through side tubes 8, thus being broken up anddistributed uniformly under the grate. This insures a uniform draftthrough the grate and consequently a uniform lire thereon. in thismanner sullicient draft will be induced through the grate 2, to dispensewith the necessity of using exhaust steam from the engine for thispurpose, leaving the exhaust steam available for other purposes.

\Vhile I. have illustrated and described the preferred construction forcarrying my invention into effect, this is capable of some modilicationwithout departing from the spirit of the invention. 1, therefore, do notwish to be limited to the exact construction set forth, but wish toavail myself of such changes and mmliticatimis as come within the scopeof the appended claims.

Ilaving described my invention what I claim as new and desire to secureby Letters Patent is:

l. The combination with the ash pit of a locomotive, of a draft tubeextending from the rear thereof and having a fornmrdly projecting mouthlocated under the ash pit; and supplemental side draft tubes projectingforwardly from each side of the ash pit, substantially as described.

The combination with the ash pit of a locomotive, of a draft tubeextending from the upper rear portion thereof and having a forwardlyprojecting mouth located under the rear of the ash pit, the mouth ofsaid tube being flaring; and sup plemental side draft tubes divergingand [laring forwardly from each side of the ash pit, substantially asdescribed.

ln testimony wherof l have signed my name to this specification in thepresence. of two subscribing witnesses.

\Vitnesses JOSHUA R. H. Po'r'rs, Lonnrra PEN TONEY.

